Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 408 9 54011 found under Switch Rotary by G E C Marconi Avionics Ltd. The National Stock Number assigned to this part is 5930011697609, and the Federal Supply Class is 5930 Switches. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 408 9 54011.